Tirukkural 421: Fortress of Wisdom

Wisdom is a weapon to ward off destruction; it is an inner fortress which enemies cannot destroy.

Image of Satguru Sivaya Subramuniyaswami
Living in the future overactivates the intellect, the emotion and the desires. The future is little more than another form of mental fantasy. Past and future are equally unreal and a hindrance to spiritual unfoldment.
—Gurudeva